LocalDateTime類getDayOfWeek()方法 (LocalDateTime Class getDayOfWeek() method)
getDayOfWeek() method is available in java.time package.
getDayOfWeek()方法在java.time包中可用。
getDayOfWeek() method is used to get the field value day-of-week that is an enum DayOfWeek from this date-time object.
getDayOfWeek()方法用于獲取星期幾的字段值，該字段值為該日期時間對象的枚舉DayOfWeek。
getDayOfWeek() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
getDayOfWeek()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。
getDayOfWeek() method does not throw an exception at the time of getting the day of the week.
getDayOfWeek()方法在獲取星期幾時不會引發異常。
Syntax:
句法：
public DayOfWeek getDayOfWeek();
Parameter(s):
參數：
None
沒有
Return value:
返回值：
The return type of this method is DayOfWeek, it returns the value day-of-week.
此方法的返回類型為DayOfWeek ，它返回星期幾的值。
Example:
例：
// Java program to demonstrate the example
// of getDayOfWeek() method of LocalDateTime
import java.time.*;
public class GetDayOfWeekOfLocalDateTime {
public static void main(String args[]) {
// Instantiates two LocalDateTime
LocalDateTime da_ti1 = LocalDateTime.parse("2005-10-05T10:10:10");
LocalDateTime da_ti2 = LocalDateTime.now();
// Display da_ti1, da_ti2
System.out.println("LocalDateTime da_ti1 and da_ti2: ");
System.out.println("da_ti1: " + da_ti1);
System.out.println("da_ti2: " + da_ti2);
System.out.println();
// Here, this method returns the field value
// day-of-week that is an enum DayOfWeek
// from this date-time object (da_ti1)
DayOfWeek dow = da_ti1.getDayOfWeek();
// Display dow
System.out.println("da_ti1.getDayOfWeek(): " + dow);
// Here, this method returns the field value
// day-of-week that is an enum DayOfWeek
// from this date-time object (da_ti2)
dow = da_ti2.getDayOfWeek();
// Display dow
System.out.println("da_ti2.getDayOfWeek(): " + dow);
}
}
Output
輸出量
LocalDateTime da_ti1 and da_ti2:
da_ti1: 2005-10-05T10:10:10
da_ti2: 2020-06-05T02:39:20.357805da_ti1.getDayOfWeek(): WEDNESDAY
da_ti2.getDayOfWeek(): FRIDAY
翻譯自: https://www.includehelp.com/java/localdatetime-getdayofweek-method-with-example.aspx
)
)
